I am trying to run Design Study Optimization for Harmonics by Varying wall thicknesses.

My problem the model does not update for each iteration.  What I have is a linked Equation txt file that is linked to 3D sketch, assembly and parts generated in the assembly.  As you see 3 wall thicknesses are changing below but model mass doesn't change:

Is this too much to ask Solidworks to modify linked Equations file and rebuild everything?

Is there a different approach to this?

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